I don't think starting aggressive is necessarily good policy and my experiences (though long ago) have not indicated that is in fact the CHP's policy.
As a young man, I had more than one encounter with the CHP. Most officers acted professionally and courteously, without coming off as aggressive. I think for the most part, they'll treat you fine if you return the favor. When pulled over, turn the car off, roll down the window, place your hands on the steering wheel, wait for the officer to address you and
don't argue, it won't help.
The "keep your hands on the steering wheel" part is important. I had a rookie CHP draw on me when I reached for my wallet as he was walking up to the car.
I won't make that mistake again.
BTW: I have only been stopped once in the last 25 years.